Earlier quoted context omitted.
The least safe new car in 2016 is vastly safer than the absolute best car produced in 1980. Remember, seat belts are a direct result of regulation mostly from US airforce testing. https://en.wikipedia.org/wiki/John_Stapp
That doesn't matter unless you're arguing that it wouldn't have happened without a government and regulation. Most of the responsibilities of a government would be better handled and implemented by the private sector.
Consider, you might think break inspections would be completely unnecessary because who would drive a car without breaks. However, in states without annual inspections have accidents related to this. https://en.wikipedia.org/wiki/Vehicle_inspection_in_the_Unit...